All,
My client application is deadlocked while writing to a file with multiple
threads using pwrite(). My setup is:
- one client node with LD_PRELOAD libofs.so
- two server nodes running orangefs trunk r12327
Writing with a single thread seems to work fine, but when I use two or more
the client process hangs. Here's what I think the state of the system is
- one of the client I/O threads is stuck in the pvfs client code waiting
for test_mutex at client-state-machine.c:812
- the other I/O thread seems to be waiting for a response from a server
in epoll_wait()
- one of the servers is idle
- the other server is stuck in an infinite loop
Obviously, that second server is the most interesting. It's stuck inside
PINT_request_disp() in the loop
for (r = request->ereq; r; r = r->ereq)
{
disp += r->offset;
}
Somehow, the request structure ended up as a circular list (r == r->ereq).
Thanks,
Nick Mills
Graduate Student
Clemson University
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